Answer Posted / srinivasan

constant water content 15.66% and easily dissolved in methanol

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2393

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How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3910

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2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

2262

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why we are using hexane in calibration of number of drop per mL

1792

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in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

887

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What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?

885

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how decide the clining method and cleaning method validation require for this perticular products?

818

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How can the GC or HPLC method is selected to determine the impurity profile in drug product?

7676

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why we use a particular hplc column for a particular compound give reasons?please

2789

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What is the calibration of uv process and preparation

2044

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What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

7604

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how much mass should be there in volumetric flask while in preparation of sample for assay? 

2664

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What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

2756

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Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1876

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What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

8916

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